CN103741877A - Lattice anti-shearing device-steel-profiled steel plate-renewable concrete combination beam and production method - Google Patents

Abstract

The ladder shearing device-steel-profiled steel plate-regenerated concrete composite beam belongs to the technical field of building construction and includes steel beams, profiled steel plates, recycled concrete, ladder shearing devices, transverse reinforcement and longitudinal reinforcement. The ladder shear device is composed of a shear connector welded on the steel beam, and a ladder transverse bar and a ladder longitudinal bar laid and welded on the upper surface of the shear connector. Ladder shear connection device is beneficial to bear the shear force at the crack, give full play to the compressive performance of the upper concrete, avoid premature concrete failure, improve the bearing capacity of the composite beam, and make it have better ductility; form a constraint with the concrete The strip greatly improves the performance of the shear connection device working with the concrete, enhances the overall stability of the structure, and is beneficial to play the role of energy dissipation and shock absorption.

Description

Ladder shear device-steel-profiled steel plate-recycled concrete composite beam and its method

technical field

The invention relates to a ladder shearing device-steel-profiled steel plate-regenerated concrete composite beam and a method thereof, which belong to a composite beam and a manufacturing method thereof.

Background technique

Steel-profiled steel plate concrete composite beam is a new type of structural member. Due to its reasonable force and convenient construction, it has been more and more applied to the floor structure of high-rise steel structure buildings and industrial factories in recent years. The composite beam gives full play to the material characteristics of high tensile strength of steel and high compressive strength of concrete, and has the advantages of light weight, high bearing pressure, high rigidity, good ductility, and good seismic performance. The profiled steel plate composite beam not only has the advantages of cast-in-place reinforced concrete beams, but also can play the role of formwork and construction platform during the construction stage, and the comprehensive economic benefits are remarkable. The use of recycled concrete is an effective way to rationally utilize construction waste, and has an important impact on creating an environment-friendly and resource-saving society.

The shear connectors have the function of bearing the shear force at the interface between steel and concrete in the composite structure, and the shear bearing capacity of the shear connectors directly affects the bearing capacity of the composite structure. The ladder shear device plays the role of transmitting and distributing the shear force at the interface, effectively reducing the slippage; the ladder shear device forms a restraint strip with the concrete, which greatly improves the performance of the joint work between the shear connection device and the concrete, and enhances the It improves the overall stability of the structure and helps to play the role of energy dissipation and shock absorption.

Contents of the invention

The invention proposes a ladder shear device-steel-profiled steel plate recycled concrete composite beam and its manufacturing method, which can realize the rational utilization of waste concrete, improve the integrity of the shear connection device, and control cracks under the premise of saving costs Carry out, give full play to the compressive performance of concrete, avoid premature concrete failure, thereby improving the bearing capacity of composite beams.

The technical scheme adopted in the present invention is:

With ladder shear device-steel-profiled steel plate-recycled concrete composite beam includes steel beam 1, profiled steel plate 2, recycled concrete 3, ladder shear device, transverse steel bar 4 and longitudinal steel bar 5; both ends of steel beam 1 Fixed on the column; the profiled steel plate 2 is fixed on the steel beam 1 through the shear connector 6; the upper surface of the shear connector 6 is laid and welded with the ladder transverse bars 7 and the ladder longitudinal bars 8; the transverse reinforcement 4 and the longitudinal reinforcement are arranged 5 and pour recycled concrete 3 to form ladder shear device-steel-profiled steel recycled concrete composite beam. The ladder shearing device is composed of a shear connector 6 welded on the steel beam 1 and a ladder transverse bar 7 and a ladder longitudinal bar 8 laid and welded on the upper surface of the shear connector 6 .

The shear connector 6 adopts pegs or high-strength bolts.

When the shear connector 6 is a stud, it is welded on the steel beam 1 using penetration welding technology, that is, the shear connector 6 is directly welded on the steel beam 1 through the profiled steel plate 2, and the weld seam should meet the corresponding technical requirements .

According to the technical solution of the present invention, the manufacturing method of the ladder shearing device-steel-profiled steel plate-recycled concrete composite beam, its manufacturing steps are as follows:

1) Lay the profiled steel plate 2 on the steel beam 1, and set the top support under the profiled steel plate 2;

2) After the profiled steel plate 2 is laid, the shear connector 6 is arranged at the corresponding position, that is, the profiled steel plate 2 and the steel beam 1 are fixed;

3) Ladder horizontal steel 7 is arranged above the shear connector 6 along the direction of steel beam 1, and the steel bar is welded to the lower shear connector 6; along the direction perpendicular to steel beam 1, the welding is arranged above the shear connector 6 Ladder longitudinal reinforcement 9 forms a ladder shear device;

4) Arrange the transverse steel bar 4 and the longitudinal steel bar 6, and bind them above the ladder shear device;

5) Recycled concrete 3 can be poured on the profiled steel plate 2 only after the shear connection device, reinforcement arrangement and top bracing are checked and accepted correctly;

6) Recycled concrete 3 should be watered and cured for no less than 7 days after final setting;

7) After the strength of the recycled concrete 3 reaches the design compressive strength, the top support can be removed.

The beneficial effects of the present invention are as follows:

The use of recycled concrete can save resources and protect the environment, and has obvious economic and environmental benefits. The ladder shear device plays the role of transmitting and distributing the shear force at the interface, effectively reducing the slippage. The contact surface between the concrete and the studs undergoes shear slip under external loads and is accompanied by the generation of splitting cracks and extends upwards. The ladder shear device is conducive to bearing the shear force at the cracks and controlling the further development of the cracks. The compressive performance of the upper concrete can avoid premature concrete failure, thereby improving the bearing capacity of the composite beam and making it have better ductility. The ladder shear device and concrete form a restraint strip, which greatly improves the performance of the shear device and concrete working together, enhances the overall stability of the structure, and is conducive to exerting the role of energy dissipation and shock absorption. Studs and high-strength bolts are flexible shear-resisting connecting members, which bear force in one direction, have good ductility, and have the advantages of simple construction.

Description of drawings

Fig. 1 is a schematic diagram of the structure of ladder shear device-steel-profiled steel plate-recycled concrete composite beam;

Fig. 2 is the structural representation of section 1-1 in Fig. 1;

Fig. 3 is a three-dimensional view of the structure of ladder shearing device-steel-profiled steel plate-recycled concrete composite beam.

Among them: 1-steel beam, 2-profiled steel plate, 3-recycled concrete, 4-transverse reinforcement, 5-longitudinal reinforcement, 6-shear connector, 7-ladder transverse reinforcement, 8-ladder longitudinal reinforcement.

Detailed ways

As shown in Figure 1, the composite beam with ladder shear device-steel-profiled steel plate-recycled concrete includes: steel beam 1, profiled steel plate 2, recycled concrete 3, ladder shear device, transverse reinforcement 4 and longitudinal reinforcement 5. The forms of the profiled steel plate 2 include open type, closed type and necked type. In this embodiment, the necked type profiled steel plate is used; The device uses pegs as shear connectors 6 . Ladder shearing device and method are to lay profiled steel plate 2 above steel beam 1, weld and fix profiled steel plate 2 to steel beam 1 through studs, lay and weld ladder bar 7 and ladder grid on the studs The longitudinal reinforcement 8 connects it as a whole, that is, the ladder shearing device; the horizontal reinforcement 4 and the longitudinal reinforcement 5 are laid and bound and connected, and the recycled concrete 3 is poured after the acceptance is correct.

Ladder shear device-steel-profiled steel plate-recycled concrete composite beam combines scattered shear connectors into a whole by welding steel bars. Concrete is destroyed by compression prematurely, thereby improving the bearing capacity of the composite beam and making it have better ductility.

The ladder shear connection device and the concrete in it form a good restrained concrete strip, which greatly improves the performance of the shear connection device and concrete working together, enhances the overall stability of the structure, and is conducive to exerting its energy dissipation and shock absorption functions. effect.

According to the technical solution of the present invention, the manufacturing method of the ladder shearing device-steel-profiled steel plate-recycled concrete composite beam, its manufacturing steps are as follows:

1) Lay the profiled steel plate 2 on the steel beam 1, and set the top support under the profiled steel plate 2;

2) After the profiled steel plate 2 is laid, the shear connector 6 is arranged at the corresponding position, that is, the profiled steel plate 2 and the steel beam 1 are fixed;

3) Ladder horizontal steel 7 is arranged above the shear connector 6 along the direction of steel beam 1, and the steel bar is welded to the lower shear connector 6; along the direction perpendicular to steel beam 1, the welding is arranged above the shear connector 6 Ladder longitudinal reinforcement 9 forms a ladder shear device;

4) Arrange the transverse steel bar 4 and the longitudinal steel bar 6, and bind them above the ladder shear device;

5) Recycled concrete 3 can be poured on the profiled steel plate 2 only after the shear connection device, reinforcement arrangement and top bracing are checked and accepted correctly;

6) Recycled concrete 3 should be watered and cured for no less than 7 days after final setting;

7) After the strength of the recycled concrete 3 reaches the design compressive strength, the top support can be removed.

The above are typical embodiments of the present invention, and the practice of the present invention is not limited thereto.

Claims (4)

1. Ladder shear device-steel-profiled steel plate-recycled concrete composite beam includes: steel beam (1), profiled steel plate (2), recycled concrete (3), ladder shear device, transverse reinforcement (4) and longitudinal reinforcement (5); both ends of the steel beam (1) are fixed on the column; the profiled steel plate (2) is fixed on the steel beam (1) through the shear connector (6); on the shear connector (6) Lay and weld ladder transverse bars (7) and ladder longitudinal bars (8) on the surface; arrange transverse bars (4) and longitudinal bars (5) and pour recycled concrete (3) to form ladder shearing devices-Steel-Profiled steel plate Recycled concrete composite beams. Among them, the ladder shear device consists of the shear connector (6) welded on the steel beam (1) and the ladder transverse reinforcement (7) and ladder longitudinal reinforcement (7) laid and welded on the upper surface of the shear connector (6). 8) Composition. 2. Ladder shear device-steel-profiled steel plate-recycled concrete composite beam according to claim 1, characterized in that: said shear connector (6) adopts studs or high-strength bolts. 3. According to claim 1, ladder shearing device-steel-profiled steel plate-recycled concrete composite beam, characterized in that: when the shear connector (6) is a stud, it is welded to the steel beam (1 ), that is, the shear connector (6) is directly welded to the steel beam (1) through the profiled steel plate (2), and the weld seam should meet the corresponding technical requirements. 4. The manufacturing method of ladder lattice shearing device-steel-profiled steel plate-recycled concrete composite beam according to claim 1, characterized in that: its manufacturing steps are as follows: 1) Lay the profiled steel plate (2) on the steel beam (1), and set the top support under the profiled steel plate (2); 2) After the profiled steel plate (2) is laid, arrange the shear connector (6) at the corresponding position, that is to fix the profiled steel plate (2) with the steel beam (1); 3) Ladder horizontal steel (7) is arranged above the shear connector (6) along the direction of the steel beam (1), and the steel bar is welded to the lower shear connector (6); The direction is to arrange the welded ladder lattice longitudinal reinforcement (9) above the shear connector (6), that is, to form the ladder lattice shear device; 4) Arrange the transverse reinforcement (4) and the longitudinal reinforcement (6), and bind them above the ladder shear device; 5) Recycled concrete (3) can be poured on the profiled steel plate (2) only after the shear connection device, reinforcement arrangement and top bracing are checked and accepted correctly; 6) Recycled concrete (3) Watering and curing after final setting shall not be less than 7 days; 7) After the strength of the recycled concrete (3) reaches the design compressive strength, the top support can be removed.

Images